ferrea Valves with ported heads , will compression go up?
#1
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Hi
I have a set of Absolute speed heads
They are 241 castings and flow around 290 CFM at 550-600 lift
they only have stock 2001-2002 2.00-1.55 valves in them
and they are stock compression.
If i was to install a set of bigger ferrea 2.02-1.57 valves will the bigger valves raise the compresion
Please let me know,
thank you for your help
I have a set of Absolute speed heads
They are 241 castings and flow around 290 CFM at 550-600 lift
they only have stock 2001-2002 2.00-1.55 valves in them
and they are stock compression.
If i was to install a set of bigger ferrea 2.02-1.57 valves will the bigger valves raise the compresion
Please let me know,
thank you for your help
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#14
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Bigger valves could raise the compression a small amount if they sit higher on the seat, thereby lowering the combustion chamber cc's. Your friend's Manley's most likely did not lead to his blow motor, though, and I doubt it raised his CR more than a .25 - .5 points max.
Jim
Jim
#15
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Originally Posted by DeltaT
Bigger valves could raise the compression a small amount if they sit higher on the seat, thereby lowering the combustion chamber cc's. Your friend's Manley's most likely did not lead to his blow motor, though, and I doubt it raised his CR more than a .25 - .5 points max.
Jim
Jim
you mean .025 and .050 which is like going 11.1 to 11.025.1 which does nothing at all